Radiation protection methods

Release time:

2021-05-27

Time protection-shorten the exposure time: shorten the exposure time is a simple and effective protection measures. For this reason, all unnecessary stays in the radiation field should be avoided. Even if the work requires, the residence time in the radiation field should be as short as possible.

(1) Prevent external exposure:

Time, distance, shielding three methods.

<1> Time protection-shorten the exposure time: Shortening the exposure time is a simple and effective protection measure. For this reason, all unnecessary stays in the radiation field should be avoided. Even if the work requires, the residence time in the radiation field should be as short as possible.

<2> Distance protection-increase the distance from the radiation source: the dose rate of the human body is close and inversely proportional to the square of the distance. In other words, if the distance is doubled, the dose rate is reduced to ¼ of the original. It is essential that there is a sufficient distance between the operator and the radiation source. To

<3> Shielding protection-set up a protective barrier between people and the source: In radiation protection, it is impossible to shorten the exposure time and increase the distance from the source indefinitely. Then the use of barrier protection is a practical and effective protection measures. Use lead plate, steel plate or concrete wall for shielding to ensure safety.

(2) Protection from physical exposure:

Radioactive substances enter the body through eating, breathing, skin absorption and wound invasion. Therefore, the protection method of internal exposure is to avoid ingestion, reduce inhalation, increase excretion, and avoid staying in contaminated areas. In addition, it is necessary to strengthen on-site decontamination work to reduce the chance of personnel contamination.

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